Koninklijke Philips Corporation N.v.

U.S. Philips Corporation

Joseph Franciscus Raymond Eijsermans

Nicola Bettina Pfeffer

Marinus Cornelis Raas

Thijs Oosterbaan

Bernardus Lambertus Martinus Van Bakel

Adrianus Sempel

Marcus Kubon

Lars Rene Christian Waumans

Wilfried Ludwig Kohlmann

Dorothea Seebode

Gerrit Jan Teije Huijgen

Piet Antonis

Onno Van Tertholen

Jacobus Marinus Maria Claassens

Cornelis Titia Staats

Hermann Krautzberger

A color adjustable lamp may be controlled using a TRIAC dimmer circuit and includes a lamp driving circuit and two or more light sources. Each light source may output light having a different color. By setting an output intensity of each light source, light having a desired color may be output. A circuit or a processing unit of the lamp driving circuit may detect a set phase angle of the TRIAC dimmer circuit by determining a shape of the supplied alternating voltage. According to the determined shape, the circuit or processing unit controls a lamp driver circuit for each light source in order to control the intensity of the light output by each light source and set the color of the color adjustable lamp by adjusting the intensity of the light emitted by each light source.

Color adjustable lamp

A high-pressure gas discharge lamp has a bulb of quartz glass and two electrode rods. One end of each electrode rod is connected to a molybdenum foil member embedded in the quartz glass material, while the other end of each electrode rod projects into the gas discharge space inside the bulb. A portion of the electrode rod is embedded in the quartz glass material of the bulb. The surface of said embedded portion of the electrode rod is provided with means dots, recesses and/or protrusions for initiating cracks at predetermined locations in the quartz glass material surrounding the electrode rod during manufacture of the lamp.

High-pressure gas discharge lamp having electrode rods with crack-initiating means

A color adjustable lamp may be controlled using a well-known TRIAC dimmer circuit. The color adjustable lamp comprises two or more light sources. Each light source may output light having a different color. By setting an output intensity of each light source, light having a desired color may be output. A circuit or a processing unit comprised in a lamp driving circuit may detect a set phase angle of the TRIAC dimmer circuit by determining a shape of the supplied alternating voltage. According to the determined shape, the circuit or processing unit controls a lamp driver circuit for each light source in order to control the intensity of the light output by each light source.

Disclosed is an artificial window () comprising a light box () having a rear wall () and a planar diffuser arrangement () in front of the rear wall (). The artificial window further comprises at least one first light source () extending between the rear wall () and the diffuser (); a window frame () in front of the diffuser (); and drivers () arranged for operating the light source () and electrically connected to the light source (). The artificial window also comprises at least one additional light source () electrically connected to one of said drivers (), which additional light source () radiates light in substantially one direction and is arranged to radiate light onto a portion of the front side of the diffuser arrangement () during operation.

Artificial window

A halogen incandescent lamp has a transparent sealed bulb, a gas filling comprising an inert gas and a halogen additive, a luminous element which is attached to a current supply system extending in a pinched portion of the bulb, and a mount extending from at least adjacent the outside of the pinched portion into the bulb and comprising at least one metal support wire which retains the luminous element in the vicinity of the end of the bulb remote from the pinched portion. The mount has a non-conducting part such that the outer end of the part of the mount at or near the outside of the pinched portion and the support wire are electrically insulated from each other.

Halogen incandescent lamp

Tungsten electrodes are arranged on two rhenium rods in an electrode chamber in a high-pressure gas discharge lamp, such that the rhenium rods project to inside the electrode chamber.

Growing community of inventors

Eindhoven, Netherlands

Joseph Franciscus Raymond Eijsermans